807 2.0hdi BTED crankcase breather

[Ian432]

I'm coming to the conclusion that I need to clean out/ replace the whatever it's called, that releases the crankcase pressure causing blow back, in order to bring it back to full health
Trouble is I'm not sure what I'm looking for, as I've had contradictory advice on the interweb. Anyone got a definite answer, please

[Ian432]

Now I'm told, on a different forum that positive crankcase pressure is normal and not to worry
whereas an engineer, of decades experience, was suggesting early sign of piston ring wear.

[moizeau]

What is the original problem that you're looking at, and the symptoms.

[GiveMeABreak]

I'm coming to the conclusion that I need to clean out/ replace the whatever it's called, that releases the crankcase pressure causing blow back, in order to bring it back to full health
Trouble is I'm not sure what I'm looking for, as I've had contradictory advice on the interweb. Anyone got a definite answer, please

We need some basic information:

What is your VIN?
What was / is the problem?
Have you had is scanned with PP2000?
Are there any fault codes and if so what are they?

This is all basic information that you may have posted elsewhere, but not on this Forum and really is essential if you want some help.

[white exec]

I would be surprised if a crankcase should operate under (positive) pressure, as oil fumes and blow-past would not be removed from the case. It is normal for a crankcase to be evacuated to the low-pressure side of the air intake, immediately after the air filter, where pressure is slightly low.

[Ian432]

What is the original problem that you're looking at, and the symptoms.

Thanks for the reply, sorry for delay in replying.
I'm part way through a European road trip, before we lose our freedom of movement
Bit too much black smoke from exhaust on hard acceleration and up hills for my liking.
I had a few days off, did oil change, filters etc and was thinking how I might improve things.
On this forum, and others, I am asking for PP2000 operatives in Spain, but to no avail.
800miles later, still rolling along

[moizeau]

If it's oil, as you were originally thinking, I would expect you to be using a bit on a road trip, clocking up the miles. If your not, it's unburnt diesel.

[Ian432]

It's definitely unburned diesel. Leaks a bit of engine oil, hence thinking excess pressure in crankcase and original question.
Without pp2000, it's pure guess work. Phone apps point towards not enough air, I've given it loads of injector cleaner, which might have helped.
I'll just keep plodding on, slowly uphill
Thanks for replying

[Ian432]

Today's fault codes are....
P0102
P 3007
P2563
As usual

[moizeau]

Excess crankcase pressure causing over fuelling or at least incorrect fuel / air ratio? Can't help with codes, sorry, apart from google, which I'm sure you've done. So you're saying the crankcase pressure is causing the leak? I thought you were referring to the smoke going up a hill under load (which if it was oil would be blueish). Where's it leaking from?

[GiveMeABreak]

I’ll have Look at those codes in the morning for you.

[Ian432]

Thanks for the replies. Sorry I've not been on line.
2 issues.
Black smoke uphills, not enough air or dodgy injector.
Slight oil leaks, which might be worsened by crankcase pressure.
Anyway, new development is blocked injector, can't remember code, and an ominous rattling

[picassodad]

dw10 engine? so has a vac pump that pumps air into the engine, excess pressure?? how is the large bore rubber hose from the cam box to down by the starter, is that blocked??

may be the cam cover could do with a good clean but you have to take it off to do that, cam sensor air gap??!!

Dodgy injector, engine makes quite loud knocking noise on one cylinder as if it may be a big end?? but noise dissappears on overrun and comes back even with slight throttle???

how is it starting, does it sound as if it has a low compression when cranking??

[GiveMeABreak]

Thanks for the replies. Sorry I've not been on line.
2 issues.
Black smoke up hills, not enough air or dodgy injector.
Slight oil leaks, which might be worsened by crankcase pressure.
Anyway, new development is blocked injector, can't remember code, and an ominous rattling

Sorry I completely forgot about those codes. Do you have your VIN, as I only have ATED variants of these to hand. If this is the DW10BTED4 with Siemens System:

P0102: Flowmeter signal: Measured flow less than the minimum flow. The signal received is outside tolerance - the electrical frequency is too high, This will cause the Engine ECU to no longer regulate the EGR valve. Suspect Air Flow Meter or the Electrical connections.

P3007: Flowmeter signal: Air flow too low. Will cause Lack of Power. Cruise and Speed Limiter functions will be disabled, whilst this error is in effect. Likely to be related to the first error, but suspect:- Electric exhaust gas recycling valve, Air flow meter, Air intake or Turbocharging pressure sensor.

P2563: Turbo position copy signal fault: Positive difference. The measured position is above reference value by 20% - too much Turbo pressure. Torque will be limited, and you will not be able to force a particle filter regeneration using Lexia until fixed. Symptoms are:- Lack of power, Noise and Smoke from the exhaust. Suspect:

• Turbocharger position copy sensor
• Electrical harness
• Connector
• Vacuum problem
• The variable geometry of the turbocharger is locked
• Particle filter
• Air metering valve